Biology Biomolecules KMDC 2014
PMDC Verified Question 142 of 142
Enzymes are molecules of one of the following group of biomolecules. Mark the correct answer which can also be defined as a biological catalyst:
A
Vitamins
B
Carbohydrate
C
Protein
D
Fats
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Protein
Concept:

Biocatalysts lower activation energy to accelerate reactions necessary for life.

Solution:

  • The vast majority of enzymes (biological catalysts) are globular Proteins.


  • Their complex, 3D folded amino acid structure creates a highly specific active site capable of binding substrates. (Note: A very small minority are catalytic RNAs called ribozymes, but protein is the primary class).


Why other options are incorrect:

  • Fats, carbohydrates, and vitamins do not possess the complex tertiary folding architectures required to form catalytic active sites. (Vitamins often act merely as co-enzymes assisting the main protein).

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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